On Tue, 6 Mar 2007, Peter wrote: > I have a client who complains that one of their own clients cannot > send mail to them. The sender has performed a simple SMTP > transmission and receives the following error: > > SMTP Error 4570: > Illegal response to the sender(550): > 550 5.7.1 H:MXB<<SMTP client IP>>Connection refused to due abuse > > I realize this is a generic MTA question but I figured some may want to > comment since it may be a spam abuse issue. I have gone to dnsstuff.com and > checked the sender IP and all is well.
What MTA is your client using? Given the grammar of the error message, it smells like a local config (e.g. something in /etc/mail/access if they're using sendmail) that's returning a hard fail with a custom error message. -- John Hardin KA7OHZ http://www.impsec.org/~jhardin/ [EMAIL PROTECTED] FALaholic #11174 pgpk -a [EMAIL PROTECTED] key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C AF76 D822 E6E6 B873 2E79 ----------------------------------------------------------------------- Failure to plan ahead on someone else's part does not constitute an emergency on my part. -- David W. Barts in a.s.r ----------------------------------------------------------------------- 5 days until Daylight Saving Time begins in U.S. - Spring Forward
